Howto??

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От J.C.M. van der Kwast
Тема Howto??
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Msg-id 000801c2ec89$f70eeb60$04a779d9@cc299057a
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Ответы Re: Howto??  (chester c young <chestercyoung@yahoo.com>)
Re: Howto??  (Tomasz Myrta <jasiek@klaster.net>)
Список pgsql-sql
Hi,
 
After trying for a week now I've come to the conclusion that help is needed. I've got the following problem:
I have a table with id column, another id (id2) column and a value column. For each id there can be more id2. I want id2 for id where the value is min. I tried several things with having but it doesn't produce what I need. Example:
 
select id, id2, min(value) from table
group by id
having count (*) >1 and min(value) = (select min(value) from table)
 
Now it complains about id2 not being part of aggregate.  
In order to get the min value I have to group by id, right? But because id2 is unique it won't do min on those values, right? So how do you tackle a problem like that? Any suggestions?
 
thanks sjors

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